Dear all,
I second Jonathan's suggestion to treat lon, lat, and time as scalars
pointed to by the coordinates attribute, and to only keep "pressure" as
a true coordinate. It seems neater to me. In CMIP5, we've required all
size-1 dimensions of this kind be treated in this way.
Karl
On 4/3/12 7:47 AM, Jonathan Gregory wrote:
Dear Andrew and Nan
If your pressure isn't monotonic, and so can't be a coordinate
variable, I don't know
whether it's preferable to demote ALL the coordinates to auxiliary
coordinate variable
status,
TEMPERATURE: coordinates = "TIME,PRESSURE,LATITUDE,LONGITUDE" ;
I don't think there's a recommendation to treat the coordinates in the same
way. If size-1 coordinates are listed in the coordinates attribute, it is also
permissible to make them scalar variables and not define the size-1 dimension.
These are CF scalar coordinate variables. e.g.
float lon;
float lat;
float time;
float temperature(pressure);
coordinates="lat lon time";
where all the variables should have units and standard_names as usual. It
doesn't matter what order is used for the coordinates attribute. Note that
it's a blank-separated list (not comma-separated).
Best wishes
Jonathan
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